HIIT TIP- they are short and to the point. The point being you should to be able to talk to your neighbor easily while you do HIIT. You should feel DONE. TIRED. FATIGUE at the end of it. But you can do it- Remember HIIT is short and goes by fast. It is not meant to be long in duration so go as hard as you can cause it will be over before you know it.
For this HIIT, challenge your speeds. On that 60 second power walk do not hold on. Pump those arms!
While you are resting, adjust the treadmill speed/incline where it needs to be so it's ready to go at that minute mark. I try and do this type of cardio AFTER I lift weights. Weights BEFORE cardio, ALWAYS!
GET OUT OF YOUR COMFORT ZONE!